When the Impact of a Merger of Competitors on a Geographic

When the impact of a merger of competitors on a geographic market is being considered, it:

A) must be the national market for federal purposes
B) must be a market in at least two states for it to be in interstate commerce under the statutes
C) can be a market in a small area and still be challenged
D) can be any market in the U.S., but the impact on foreign markets is not to be considered
E) must simultaneously demonstrate harm on a product market